Presented to

[نام نویسنده را انتخاب نمایید]

This is to certify that your paper entitled «Schiff base complexes of Co (ӀӀ) and Cu (ӀӀ)-immobilized on modified magnetic iron oxide nanoparticles as retrievable heterogeneous nanocatalysts for oxidation of olefins» was indexed with 8 pages, in the CIVILICA citation database, code COI:IMES13_108, after evaluation and approval of the referees of the "8th International Conferenece and Exhibition on Materials Engineering and Metallurg held in Tehran 2019.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.